/**
 * LinguAbroad 言桥国际教育 — 主样式
 * 白+深蓝(#1A365D)+浅蓝(#4A90D9)+金色(#C8963E)
 * 亮色专业风格，杂志式留白，小圆角
 * 字体: Noto Serif SC (标题) + Noto Sans SC (正文)
 * 纯原生 CSS，依赖：FA6 / Swiper / AOS
 */


/* ============================================================
   CSS 变量体系
   ============================================================ */
:root {
  /* 主色调 */
  --blue-deep: #1A365D;
  --blue-deep-hover: #122A4A;
  --blue-light: #4A90D9;
  --blue-light-hover: #3A7BC8;
  --blue-pale: #EBF2FA;
  --blue-bg: #F5F8FC;

  /* 金色点缀 */
  --gold: #C8963E;
  --gold-light: #D4A853;
  --gold-pale: #FDF8F0;

  /* 中性色 */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  /* 文字 */
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --text-white: #FFFFFF;

  /* 边框 */
  --border-light: #E5E7EB;
  --border-blue: rgba(74, 144, 217, 0.2);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 10px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 50px -6px rgba(0,0,0,0.1);

  /* 圆角 — 小圆角专业感 */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* 间距 */
  --section-py: 80px;
  --container-max: 1200px;
  --header-h: 70px;

  /* 过渡 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* 字体 */
  --font-heading: 'Noto Serif SC', 'STSong', 'SimSun', 'PingFang SC', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-en: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

/* ============================================================
   全局重置
   ============================================================ */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body {
  background: var(--white);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
::selection { background: rgba(26,54,93,0.15); color: var(--blue-deep); }
a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:hover { color: var(--blue-light); }
img { max-width:100%; height:auto; display:block; }
ul, ol { list-style:none; }
input, textarea, select, button { font-family:inherit; font-size:inherit; }
input::placeholder, textarea::placeholder { color: var(--gray-400); opacity:1; }

/* ============================================================
   排版
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.35;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* ============================================================
   布局容器
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: var(--section-py) 0; }
.section--gray { background: var(--gray-50); }
.section--blue { background: var(--blue-bg); }
.section--deep { background: var(--blue-deep); color: rgba(255,255,255,0.85); }
.section--deep .section-title { color: #fff; }
.section--deep .section-subtitle { color: rgba(255,255,255,0.7); }

/* ============================================================
   按钮系统
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--blue-deep);
  color: #fff;
}
.btn--primary:hover {
  background: var(--blue-deep-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: #fff;
}

.btn--accent {
  background: var(--gold);
  color: #fff;
}
.btn--accent:hover {
  background: var(--gold-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--blue-deep);
  border: 1.5px solid var(--blue-deep);
}
.btn--outline:hover {
  background: var(--blue-deep);
  color: #fff;
  transform: translateY(-1px);
}

.btn--outline-white {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.5);
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn--ghost:hover { color: var(--blue-light); }

.btn--sm { padding: 8px 18px; font-size: 0.85rem; }
.btn--lg { padding: 16px 36px; font-size: 1rem; }

/* ============================================================
   ★ Header — 白色实底+深蓝文字 (13.11避坑)
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}
.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Logo */
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  margin-right: auto;
}
.header__logo-icon {
  width: 42px; height: 42px;
  background: var(--blue-deep);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
}
.header__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.header__logo-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue-deep);
}
.header__logo-sub {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--blue-light);
}

/* 主导航 */
.header__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.header__nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.header__nav-link:hover,
.header__nav-link.active {
  color: var(--blue-deep);
  background: var(--blue-pale);
}

/* 导航下拉 (13.3: 高z-index) */
.header__nav-item { position: relative; }
.header__nav-item:hover .header__dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.header__dropdown {
  position: absolute;
  top: 100%; left: 0;
  min-width: 160px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-out);
  z-index: 60;
}
.header__dropdown a {
  display: block;
  padding: 10px 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}
.header__dropdown a:hover {
  color: var(--blue-deep);
  background: var(--blue-pale);
}

/* 右侧CTA */
.header__actions {
  display: flex; align-items: center; gap: 10px; margin-left: 20px;
}
.header__cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px;
  background: var(--blue-deep);
  color: #fff !important;
  font-size: 0.85rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}
.header__cta:hover {
  background: var(--gold);
  transform: translateY(-1px);
}

/* 汉堡菜单 — 独立于header__actions (13.4避坑) */
.hamburger {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
  background: none; border: none;
  cursor: pointer; z-index: 110;
  margin-left: 8px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--blue-deep);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* 移动端侧滑菜单 */
.mobile-nav {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: 80%; max-width: 350px;
  background: #fff;
  z-index: 120;
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out);
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav__inner { padding: 24px; padding-top: 80px; }
.mobile-nav__link {
  display: block; padding: 14px 16px;
  font-size: 1rem; color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast);
}
.mobile-nav__link:hover { color: var(--blue-deep); background: var(--blue-pale); }
.mobile-nav__sub { padding-left: 16px; display: none; }
.mobile-nav__sub.open { display: block; }
.mobile-nav__sub a {
  display: block; padding: 10px 16px;
  font-size: 0.9rem; color: var(--text-muted);
  border-radius: var(--radius-sm);
}
.mobile-nav__overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 115;
  opacity: 0; pointer-events: none;
  transition: opacity var(--duration-normal);
}
.mobile-nav__overlay.show { opacity: 1; pointer-events: auto; }

/* ============================================================
   内页 Banner
   ============================================================ */
.inner-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  background: var(--blue-deep);
  margin-top: var(--header-h);
}
.inner-banner__bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.3;
}
.inner-banner__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(26,54,93,0.7) 0%, rgba(26,54,93,0.85) 100%);
}
.inner-banner__content {
  position: relative; height: 100%;
  display: flex; flex-direction: column; justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto; padding: 0 24px;
  color: #fff;
}
.inner-banner__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700; color: #fff; margin-bottom: 0.5rem;
}
.inner-banner__subtitle {
  font-size: 1.05rem; color: rgba(255,255,255,0.7);
}

/* 面包屑 */
.breadcrumb-bar {
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  max-width: var(--container-max);
  margin: 0 auto; padding: 12px 24px;
  font-size: 0.85rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--blue-light); }
.breadcrumb i { font-size: 0.6rem; color: var(--text-muted); }

/* ============================================================
   ★ 首页 — Hero Banner
   ============================================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}
.hero .swiper {
  position: absolute; inset: 0; z-index: 0;
}
.hero__slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.hero__overlay {
  position: absolute; inset: 0; z-index: 2;
  background: linear-gradient(160deg,
    rgba(26,54,93,0.75) 0%,
    rgba(26,54,93,0.4) 40%,
    rgba(26,54,93,0.6) 100%);
}
.hero__content {
  position: relative; z-index: 3; height: 100%;
  display: flex; flex-direction: column; justify-content: center;
  max-width: var(--container-max);
  margin: 0 auto; padding: 0 24px;
}
.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700; color: #fff;
  line-height: 1.15; margin-bottom: 1rem;
  max-width: 700px;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.8);
  margin-bottom: 2rem; max-width: 560px; line-height: 1.6;
}
.hero__actions {
  display: flex; gap: 14px; flex-wrap: wrap;
}
.hero-pagination {
  position: absolute; bottom: 40px;
  left: 50%; transform: translateX(-50%);
  z-index: 3;
  display: flex; gap: 8px;
}
.hero-pagination .swiper-pagination-bullet {
  width: 32px; height: 3px; border-radius: 2px;
  background: rgba(255,255,255,0.4); opacity: 1;
  transition: all var(--duration-normal); cursor: pointer;
}
.hero-pagination .swiper-pagination-bullet-active {
  width: 48px; background: var(--gold);
}

/* ============================================================
   卡片系统 — 白底蓝边
   ============================================================ */
.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  display: flex; flex-direction: column;
}
.card:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.card__image {
  position: relative; overflow: hidden; aspect-ratio: 16/10;
  background: var(--gray-100);
}
.card__image img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}
.card:hover .card__image img { transform: scale(1.05); }
.card__body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.card__tag {
  display: inline-block; align-self: flex-start;
  padding: 3px 10px; font-size: 0.72rem; font-weight: 600;
  color: var(--blue-light); background: var(--blue-pale);
  border-radius: 3px; margin-bottom: 8px;
}
.card__title {
  font-family: var(--font-heading);
  font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 6px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card__desc {
  font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; flex: 1;
}
.card__meta {
  display: flex; align-items: center; gap: 12px;
  margin-top: 12px; padding-top: 12px;
  border-top: 1px solid var(--gray-100);
  font-size: 0.82rem; color: var(--text-muted);
}
.card__meta i { color: var(--blue-light); }

/* 语言课程卡片 */
.course-card .card__image {
  position: relative;
}
.course-card__level {
  position: absolute; top: 12px; right: 12px;
  padding: 4px 12px;
  background: var(--gold); color: #fff;
  font-size: 0.75rem; font-weight: 600;
  border-radius: 3px; z-index: 2;
}
.course-card__price {
  font-family: var(--font-heading);
  font-size: 1.25rem; font-weight: 700;
  color: var(--gold); margin-top: 8px;
}

/* 教师卡片 */
.teacher-card { text-align: center; }
.teacher-card .card__image {
  aspect-ratio: 1/1; border-radius: 50%;
  width: 140px; height: 140px; margin: 24px auto 0;
  border: 3px solid var(--blue-pale);
}
.teacher-card .card__body { text-align: center; }
.teacher-card__role {
  font-size: 0.82rem; color: var(--blue-light); margin-bottom: 4px;
}
.teacher-card__lang {
  display: inline-block;
  padding: 2px 8px; font-size: 0.72rem;
  background: var(--gold-pale); color: var(--gold);
  border-radius: 3px; margin-top: 8px;
}

/* ============================================================
   首页 — 学校数据 (CountUp)
   ============================================================ */
.stats-section {
  background: var(--blue-deep);
  padding: 60px 0;
}
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 24px 16px;
}
.stat-item__icon {
  font-size: 2rem; color: var(--gold); margin-bottom: 12px;
}
.stat-item__number {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700; color: #fff; line-height: 1;
  margin-bottom: 8px;
}
.stat-item__label {
  font-size: 0.88rem; color: rgba(255,255,255,0.65);
}

/* ============================================================
   首页 — 课程分类（6列网格）
   ============================================================ */
.course-cats {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.course-cat-item {
  text-align: center;
  padding: 28px 12px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}
.course-cat-item:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.course-cat-item__icon {
  width: 56px; height: 56px; margin: 0 auto 12px;
  border-radius: var(--radius-md);
  background: var(--blue-pale);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--blue-deep);
  transition: all var(--duration-normal);
}
.course-cat-item:hover .course-cat-item__icon {
  background: var(--blue-deep); color: #fff;
}
.course-cat-item__name {
  font-family: var(--font-heading);
  font-size: 0.95rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 2px;
}
.course-cat-item__en {
  font-size: 0.75rem; color: var(--text-muted);
  text-transform: uppercase;
}

/* ============================================================
   首页 — 留学服务卡片
   ============================================================ */
.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  padding: 40px 28px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-normal) var(--ease-out);
}
.service-card:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.service-card__num {
  font-family: var(--font-en);
  font-size: 3rem; font-weight: 700;
  color: var(--blue-pale); line-height: 1;
  margin-bottom: -20px;
}
.service-card__icon {
  width: 60px; height: 60px; margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--blue-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: #fff;
}
.service-card__title {
  font-family: var(--font-heading);
  font-size: 1.1rem; font-weight: 600;
  color: var(--text-primary); margin-bottom: 8px;
}
.service-card__desc {
  font-size: 0.88rem; color: var(--text-secondary); line-height: 1.6;
}

/* ============================================================
   首页 — CTA 横条
   ============================================================ */
.cta-section {
  background: var(--blue-deep);
  padding: 70px 0; text-align: center;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: rgba(200,150,62,0.1);
  top: -80px; right: -80px;
}
.cta-section__title {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700; color: #fff; margin-bottom: 1rem;
}
.cta-section__subtitle {
  font-size: 1.05rem; color: rgba(255,255,255,0.7); margin-bottom: 32px;
}
.cta-section .btn--accent {
  animation: pulse-gold 2s ease-in-out infinite;
}
@keyframes pulse-gold {
  0%, 100% { box-shadow: 0 0 0 0 rgba(200,150,62,0.4); }
  50% { box-shadow: 0 0 0 16px rgba(200,150,62,0); }
}

/* ============================================================
   首页 — 文化交流 Swiper
   ============================================================ */
.culture-swiper {
  overflow: hidden; border-radius: var(--radius-lg);
}
.culture-swiper .swiper-slide {
  aspect-ratio: 16/7; border-radius: var(--radius-lg); overflow: hidden;
}
.culture-swiper .swiper-slide img {
  width: 100%; height: 100%; object-fit: cover;
}
.culture-swiper .swiper-pagination-bullet {
  background: rgba(255,255,255,0.6);
}
.culture-swiper .swiper-pagination-bullet-active {
  background: var(--gold);
}

/* ============================================================
   列表页网格
   ============================================================ */
.list-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.list-grid--4 { grid-template-columns: repeat(4, 1fr); }
.list-header { text-align: center; margin-bottom: 48px; padding-top: 20px; }
.list-header h1 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 0.5rem; }

/* 子栏目过滤栏 */
.filter-bar {
  display: flex; align-items: center; gap: 8px;
  overflow-x: auto; padding-bottom: 8px; margin-bottom: 32px;
  -ms-overflow-style: none; scrollbar-width: none;
}
.filter-bar::-webkit-scrollbar { display: none; }
.filter-bar a {
  display: inline-flex; padding: 8px 20px;
  font-size: 0.88rem; font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--gray-200); border-radius: 100px;
  white-space: nowrap; flex-shrink: 0;
  transition: all var(--duration-fast) var(--ease-out);
}
.filter-bar a:hover, .filter-bar a.active {
  color: #fff; background: var(--blue-deep); border-color: var(--blue-deep);
}

/* 空状态 */
.empty-state {
  text-align: center; padding: 80px 20px;
}
.empty-state i { font-size: 3rem; color: var(--gray-300); margin-bottom: 16px; display: block; }
.empty-state p { color: var(--text-muted); font-size: 0.95rem; }

/* ============================================================
   课程详情页
   ============================================================ */
.course-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.course-detail__image {
  border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4/3; background: var(--gray-100);
}
.course-detail__image img { width: 100%; height: 100%; object-fit: cover; }
.course-detail__info h1 {
  font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 0.5rem;
}
.course-detail__meta {
  display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 24px;
  font-size: 0.88rem; color: var(--text-secondary);
}
.course-detail__meta span {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 12px; background: var(--blue-pale);
  border-radius: var(--radius-xs); color: var(--blue-deep);
  font-weight: 500;
}
.course-detail__params {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px; margin-bottom: 28px;
}
.course-detail__param {
  padding: 16px; text-align: center;
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
}
.course-detail__param-label {
  font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px;
}
.course-detail__param-value {
  font-size: 0.95rem; font-weight: 600; color: var(--text-primary);
}
.course-detail__body {
  color: var(--text-secondary); line-height: 2; font-size: 0.95rem;
}
.course-detail__body img { border-radius: var(--radius-md); margin: 20px 0; }
.gold-highlight {
  color: var(--gold); font-weight: 700; font-size: 1.5rem;
}

/* ============================================================
   教师详情页
   ============================================================ */
.teacher-profile {
  display: grid; grid-template-columns: 300px 1fr;
  gap: 48px; align-items: start;
}
.teacher-profile__avatar {
  width: 100%; aspect-ratio: 1/1;
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--gray-100); border: 3px solid var(--blue-pale);
}
.teacher-profile__avatar img { width: 100%; height: 100%; object-fit: cover; }
.teacher-profile__badge {
  display: inline-block; padding: 4px 12px;
  background: var(--gold); color: #fff;
  font-size: 0.78rem; font-weight: 600; border-radius: 3px;
  margin-bottom: 8px;
}

/* ============================================================
   单页（关于我们/联系我们/留学服务）
   ============================================================ */
.single-content {
  max-width: 900px; margin: 0 auto;
  color: var(--text-secondary); line-height: 2; font-size: 0.95rem;
}
.single-content h2 { font-size: 1.5rem; margin: 40px 0 16px; }
.single-content h3 { font-size: 1.2rem; margin: 28px 0 12px; }
.single-content p { margin-bottom: 16px; }
.single-content img { border-radius: var(--radius-md); margin: 24px 0; }

/* 关于我们 — 数据模块 */
.about-features {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; margin: 48px 0;
}
.about-feature {
  text-align: center; padding: 32px 20px;
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
}
.about-feature__icon {
  font-size: 2rem; color: var(--blue-deep); margin-bottom: 12px;
}
.about-feature__title {
  font-size: 1.05rem; font-weight: 600; color: var(--text-primary);
  margin-bottom: 8px;
}
.about-feature__label {
  font-size: 0.9rem; color: var(--text-muted);
}

/* 联系我们 */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 40px; align-items: start;
}
.contact-card {
  padding: 24px; background: #fff;
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  display: flex; align-items: flex-start; gap: 16px;
  margin-bottom: 12px; transition: all var(--duration-fast);
}
.contact-card:hover { border-color: var(--blue-light); }
.contact-card__icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--blue-pale); color: var(--blue-deep);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.contact-card__label {
  font-size: 0.85rem; font-weight: 600; color: var(--text-primary); margin-bottom: 2px;
}
.contact-card__value {
  font-size: 0.9rem; color: var(--text-secondary);
}
.contact-form-wrap {
  padding: 32px; background: #fff;
  border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
}

/* 表单控件 */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 0.88rem; font-weight: 500;
  color: var(--text-primary); margin-bottom: 6px;
}
.form-group label .required { color: #EF4444; }
.form-control {
  width: 100%; padding: 12px 16px;
  background: #fff; border: 1px solid var(--gray-300);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 0.92rem; transition: all var(--duration-fast) var(--ease-out);
}
.form-control:focus {
  outline: none; border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
}
textarea.form-control { resize: vertical; min-height: 120px; }

/* ============================================================
   水平测试页
   ============================================================ */
.test-form { max-width: 700px; margin: 0 auto; }
.test-question {
  padding: 28px; background: #fff;
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  margin-bottom: 20px;
}
.test-question__num {
  font-size: 0.85rem; font-weight: 700; color: var(--blue-light);
  margin-bottom: 8px;
}
.test-question__text {
  font-size: 1.05rem; font-weight: 600; color: var(--text-primary);
  margin-bottom: 16px;
}
.test-options { display: flex; flex-direction: column; gap: 8px; }
.test-option {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--duration-fast);
}
.test-option:hover { border-color: var(--blue-light); background: var(--blue-pale); }
.test-option input[type="radio"] { accent-color: var(--blue-deep); }
.test-result {
  text-align: center; padding: 48px 24px;
  background: var(--blue-bg); border-radius: var(--radius-lg);
  display: none;
}
.test-result__level {
  font-size: 2rem; font-weight: 700; color: var(--blue-deep); margin: 16px 0;
}
.test-result__desc { color: var(--text-secondary); margin-bottom: 24px; }

/* ============================================================
   搜索页
   ============================================================ */
.search-box { max-width: 700px; margin: 0 auto; }
.search-form-row { display: flex; gap: 10px; }
.search-input-wrap { position: relative; flex: 1; }
.search-input-wrap i {
  position: absolute; left: 14px; top: 50%;
  transform: translateY(-50%); color: var(--text-muted);
}
.search-input-wrap input {
  width: 100%; padding: 14px 16px 14px 40px;
  border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  font-size: 0.95rem;
}
.search-input-wrap input:focus {
  outline: none; border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
}
.search-result-item {
  display: flex; gap: 16px;
  padding: 18px; background: #fff;
  border: 1px solid var(--gray-200); border-radius: var(--radius-md);
  margin-bottom: 10px; transition: all var(--duration-fast);
}
.search-result-item:hover { border-color: var(--blue-light); }
.search-result-item__thumb {
  width: 120px; height: 90px; border-radius: var(--radius-sm);
  overflow: hidden; flex-shrink: 0; background: var(--gray-100);
}
.search-result-item__thumb img { width: 100%; height: 100%; object-fit: cover; }
.search-result-item__info { flex: 1; min-width: 0; }
.search-result-item__title {
  font-size: 1rem; font-weight: 600; color: var(--text-primary);
  margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search-result-item__desc {
  font-size: 0.85rem; color: var(--text-secondary);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
  display: flex; justify-content: center; align-items: center;
  gap: 4px; margin-top: 48px;
}
.pagination a, .pagination span {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 8px;
  font-size: 0.88rem; color: var(--text-secondary);
  border-radius: var(--radius-sm); border: 1px solid var(--gray-200);
  transition: all var(--duration-fast);
  background: #fff;
}
.pagination a:hover {
  border-color: var(--blue-light); color: var(--blue-deep);
}
.pagination .active {
  background: var(--blue-deep); color: #fff; border-color: var(--blue-deep);
  font-weight: 600;
}
.pagination .disabled { color: var(--gray-300); pointer-events: none; }

/* ============================================================
   详情页通用
   ============================================================ */
.detail {
  max-width: 900px; margin: 0 auto;
}
.detail__header {
  margin-bottom: 32px; padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-200);
}
.detail__title {
  font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 12px;
}
.detail__meta-row {
  display: flex; flex-wrap: wrap; gap: 16px;
  font-size: 0.85rem; color: var(--text-muted);
}
.detail__meta-row i { margin-right: 4px; color: var(--blue-light); }
.detail__body {
  color: var(--text-secondary); line-height: 2; font-size: 0.95rem;
}
.detail__body img { border-radius: var(--radius-md); margin: 24px 0; max-width: 100%; }
.detail__body p { margin-bottom: 16px; }
.detail__pager {
  display: flex; justify-content: space-between;
  margin-top: 48px; padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  font-size: 0.9rem;
}
.detail__pager a { color: var(--blue-light); }

/* 相关推荐 */
.related-title {
  font-size: 1.35rem; font-weight: 700; margin: 56px 0 24px;
}
.related-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}

/* ============================================================
   图文错落模块（杂志式）
   ============================================================ */
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: center;
}
.feature-row--reverse { direction: rtl; }
.feature-row--reverse > * { direction: ltr; }
.feature-row__image {
  border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4/3; background: var(--gray-100);
  border: 1px solid var(--gray-200);
}
.feature-row__image img { width: 100%; height: 100%; object-fit: cover; }
.feature-row__text h2 { margin-bottom: 16px; }
.feature-row__text p {
  color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px;
}

/* ============================================================
   首页 — 新闻列表（左图右文）
   ============================================================ */
.news-list-home { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  display: flex; gap: 20px;
  padding: 16px; background: #fff;
  border: 1px solid var(--gray-100); border-radius: var(--radius-md);
  transition: all var(--duration-fast); align-items: center;
}
.news-item:hover { border-color: var(--blue-light); box-shadow: var(--shadow-sm); }
.news-item__thumb {
  width: 180px; height: 120px; border-radius: var(--radius-sm);
  overflow: hidden; flex-shrink: 0; background: var(--gray-100);
}
.news-item__thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item__info { flex: 1; min-width: 0; }
.news-item__title {
  font-size: 1rem; font-weight: 600; color: var(--text-primary);
  margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.news-item__date {
  font-size: 0.82rem; color: var(--text-muted); margin-bottom: 4px;
}
.news-item__desc {
  font-size: 0.88rem; color: var(--text-secondary);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================================
   ★ Footer 底部 — 深蓝背景
   ============================================================ */
.footer {
  background: var(--blue-deep);
  color: rgba(255,255,255,0.7);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 60px 0 40px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px; padding-right: 24px;
}
.footer__brand-desc {
  font-size: 0.88rem; color: rgba(255,255,255,0.55);
  line-height: 1.7; margin: 16px 0;
}
.footer__social { display: flex; gap: 10px; }
.footer__social a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.6); font-size: 0.95rem;
  transition: all var(--duration-fast);
}
.footer__social a:hover {
  background: var(--gold); color: #fff;
}
.footer__col-title {
  font-family: var(--font-heading);
  font-size: 1rem; font-weight: 600;
  color: #fff; margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold);
  display: inline-block;
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: 0.88rem; color: rgba(255,255,255,0.55); }
.footer__links a:hover { color: var(--gold); }
.footer__contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-bottom: 10px;
}
.footer__contact-item i { color: var(--gold); margin-top: 3px; flex-shrink: 0; }
.footer__qrcode {
  width: 110px; height: 110px; background: #fff;
  border-radius: var(--radius-sm); padding: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; color: #999;
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
}
.footer__bottom-inner {
  display: flex; justify-content: space-between; align-items: center;
  max-width: var(--container-max);
  margin: 0 auto; padding: 0 24px;
  font-size: 0.8rem; color: rgba(255,255,255,0.4);
  flex-wrap: wrap; gap: 8px;
}
.footer__bottom a { color: rgba(255,255,255,0.4); }
.footer__bottom a:hover { color: var(--gold); }

/* 友情链接 */
.friend-links {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  padding: 16px 0; max-width: var(--container-max);
  margin: 0 auto; padding-left: 24px; padding-right: 24px;
}
.friend-links__label {
  font-size: 0.82rem; color: rgba(255,255,255,0.4); flex-shrink: 0;
}
.friend-links a {
  font-size: 0.82rem; color: rgba(255,255,255,0.35);
}
.friend-links a:hover { color: var(--gold); }

/* ============================================================
   返回顶部 + 在线客服
   ============================================================ */
.back-top {
  position: fixed; right: 20px; bottom: 80px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--blue-deep); color: #fff;
  border: none; cursor: pointer; z-index: 80;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; opacity: 0; pointer-events: none;
  transition: all var(--duration-normal); box-shadow: var(--shadow-md);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { background: var(--gold); transform: translateY(-2px); }

/* 在线客服按钮 */
.online-service {
  position: fixed; right: 20px; bottom: 136px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gold); color: #fff;
  border: none; cursor: pointer; z-index: 80;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; box-shadow: var(--shadow-md);
  transition: all var(--duration-normal);
}
.online-service:hover {
  background: var(--gold-light); transform: scale(1.1);
}

/* ============================================================
   动画
   ============================================================ */
/* 淡入上移 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fadeInUp {
  animation: fadeInUp 0.6s var(--ease-out) both;
}

/* 标题下划线 */
.title-underline {
  position: relative; display: inline-block;
  padding-bottom: 12px; margin-bottom: 32px;
}
.title-underline::after {
  content: ''; position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 50px; height: 3px; background: var(--gold);
  border-radius: 2px;
}
.section-header--left .title-underline::after {
  left: 0; transform: none;
}

/* AOS 覆盖 */
[data-aos] { transition-timing-function: var(--ease-out); }

/* ============================================================
   响应式 — 平板 (≤1023px)
   ============================================================ */
@media (max-width: 1023px) {
  :root { --section-py: 60px; }

  .header__nav, .header__actions { display: none; }
  .hamburger { display: flex; }

  .course-cats { grid-template-columns: repeat(3, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }

  .list-grid { grid-template-columns: repeat(2, 1fr); }
  .list-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row { grid-template-columns: 1fr; gap: 32px; }
  .service-cards { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }

  .course-detail { grid-template-columns: 1fr; gap: 32px; }
  .teacher-profile { grid-template-columns: 1fr; }
  .teacher-profile__avatar { max-width: 250px; }
  .about-features { grid-template-columns: repeat(2, 1fr); }

  .contact-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .news-item { flex-direction: column; }
  .news-item__thumb { width: 100%; height: 180px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================================
   响应式 — 手机 (≤767px)
   ============================================================ */
@media (max-width: 767px) {
  :root { --section-py: 48px; }

  .hero { height: 75vh; min-height: 450px; }
  .hero__title { font-size: clamp(1.5rem, 6vw, 2rem); }
  .hero__actions { flex-direction: column; align-items: flex-start; }

  .inner-banner { height: 200px; margin-top: var(--header-h); }

  /* 核心课程 6 语言卡 — 手机端一行3个(共2行)并压缩 (仅移动端生效) */
  .course-cats { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .course-cat-item { padding: 14px 6px; }
  .course-cat-item__icon { width: 44px; height: 44px; margin: 0 auto 8px; font-size: 1.1rem; }
  .course-cat-item__name { font-size: 0.82rem; }
  .course-cat-item__en { font-size: 0.62rem; }

  /* 轮播图下 4 个数据方块 — 手机端整体压缩 (仅移动端生效) */
  .stats-section { padding: 28px 0; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 8px 12px; }
  .stat-item { padding: 12px 8px; }
  .stat-item__icon { font-size: 1.2rem; margin-bottom: 6px; }
  .stat-item__number { font-size: 1.5rem; margin-bottom: 4px; }
  .stat-item__label { font-size: 0.72rem; }
  /* 留学服务 — 手机端三个并排 + 压缩 (仅移动端生效) */
  .service-cards { grid-template-columns: repeat(3, 1fr); gap: 8px; max-width: 100%; margin: 0 auto; }
  .service-card { padding: 18px 6px 14px; }
  .service-card__num { font-size: 1.4rem; margin-bottom: -10px; }
  .service-card__icon { width: 40px; height: 40px; margin: 0 auto 10px; font-size: 0.95rem; }
  .service-card__title { font-size: 0.9rem; margin-bottom: 0; }
  .service-card__desc { display: none; }

  .list-grid { grid-template-columns: 1fr; }
  .list-grid--4 { grid-template-columns: repeat(2, 1fr); }

  /* 课程卡 2 列压缩 — 手机端一行两个 (首页热门课程 / 课程中心列表共用) */
  .list-grid.list-grid--2 { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .list-grid--2 .card__body { padding: 12px; }
  .list-grid--2 .card__tag { padding: 2px 8px; font-size: 0.68rem; margin-bottom: 6px; }
  .list-grid--2 .card__title { font-size: 0.92rem; margin-bottom: 4px; }
  .list-grid--2 .card__desc { font-size: 0.78rem; line-height: 1.5; -webkit-line-clamp: 1; }
  .list-grid--2 .card__meta { margin-top: 8px; padding-top: 8px; font-size: 0.72rem; }
  .list-grid--2 .course-card__price { font-size: 1.05rem; margin-top: 6px; }

  /* 首页师资团队 — 手机端一行三个 + 卡片压缩 (仅首页 teachers 列表) */
  .list-grid.list-grid--teachers { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .list-grid--teachers .teacher-card .card__image {
    width: 68px; height: 68px; margin: 14px auto 0; border-width: 2px;
  }
  .list-grid--teachers .card__body { padding: 10px 4px 12px; }
  .list-grid--teachers .teacher-card__role { font-size: 0.62rem; margin-bottom: 2px; }
  .list-grid--teachers .card__title { font-size: 0.8rem; margin-bottom: 0; }
  .list-grid--teachers .card__desc { display: none; }
  .list-grid--teachers .teacher-card__lang { margin-top: 6px; padding: 1px 6px; font-size: 0.58rem; }

  /* 首页学生案例 — 手机端一行一个 + 卡片压缩 (仅首页 cases 列表) */
  .list-grid--cases .card__image { aspect-ratio: 16/7; }
  .list-grid--cases .card__body { padding: 12px 14px; }
  .list-grid--cases .card__tag { padding: 2px 8px; font-size: 0.68rem; margin-bottom: 6px; }
  .list-grid--cases .card__title { font-size: 0.95rem; margin-bottom: 4px; }
  .list-grid--cases .card__desc { font-size: 0.8rem; line-height: 1.5; -webkit-line-clamp: 2; }

  /* 首页新闻资讯 — 手机端压缩 (仅首页 news 列表) */
  .news-list-home { gap: 10px; }
  .news-list-home .news-item { padding: 10px; gap: 10px; }
  .news-list-home .news-item__thumb { height: 110px; border-radius: 6px; }
  .news-list-home .news-item__title { font-size: 0.95rem; margin-bottom: 4px; }
  .news-list-home .news-item__date { font-size: 0.72rem; margin-bottom: 3px; }
  .news-list-home .news-item__desc { font-size: 0.78rem; line-height: 1.5; -webkit-line-clamp: 1; }

  /* 首页 CTA 横条 — 手机端压缩 (仅移动端生效) */
  .cta-section { padding: 32px 0; }
  .cta-section__title { font-size: 1.3rem; margin-bottom: 8px; }
  .cta-section__subtitle { font-size: 0.85rem; margin-bottom: 18px; }
  .cta-section .btn--lg { padding: 12px 22px; font-size: 0.9rem; }

  .course-detail__params { grid-template-columns: repeat(2, 1fr); }
  /* 关于我们 3 个数据框 — 手机端一行三个 + 压缩 (仅移动端生效) */
  .about-features { grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 28px 0; }
  .about-feature { padding: 14px 4px; }
  .about-feature__icon { font-size: 1.2rem; margin-bottom: 6px; }
  .about-feature__title { font-size: 0.92rem; margin-bottom: 4px; }
  .about-feature__label { font-size: 0.62rem; }
  .related-grid { grid-template-columns: 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: 32px; }

  /* 底部快速链接 — 手机端横排自动换行 */
  .footer__links { flex-direction: row; flex-wrap: wrap; gap: 8px 18px; }
  .footer__links a { font-size: 0.84rem; }

  .footer__bottom-inner { flex-direction: column; text-align: center; }

  .back-top, .online-service { right: 12px; }
  .online-service { bottom: 116px; }
  .back-top { bottom: 64px; }

  .search-result-item { flex-direction: column; }
  .search-result-item__thumb { width: 100%; height: 160px; }
  .detail__pager { flex-direction: column; gap: 8px; text-align: center; }
}

/* 小屏手机 */
@media (max-width: 374px) {
  .course-cats { grid-template-columns: repeat(3, 1fr); }
  .course-cat-item { padding: 10px 4px; }
  .course-cat-item__icon { width: 38px; height: 38px; }
  .course-cat-item__name { font-size: 0.76rem; }
  .course-cat-item__en { font-size: 0.56rem; }
  .stats { grid-template-columns: 1fr; }
}